Classification of the genus Thecoseris
G. †Thecoseris Fromentel and Ferry 1869
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†Thecoseris benoisti Koby 1906
†Thecoseris convoluta Koby 1895
†Thecoseris cossmanni Koby 1906
†Thecoseris dollfussi Koby 1906
†Thecoseris pumila Koby 1895